Home / 31,004.72-42,787.06-16,857.66

Finding the Fourth Proportional to 31,004.72, 42,787.06 and 16,857.66

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Solution

The fourth proportional to 31,004.72, 42,787.06 and 16,857.66 is: 23,263.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,004.72 : 42,787.06 = 16,857.66 : x
  2. Step 2: Convert to fraction form
    31,004.72/42,787.06 = 16,857.66/x
  3. Step 3: Cross multiply
    31,004.72x = 42,787.06 × 16,857.66
  4. Step 4: Simplify right side
    31,004.72x = 721,289,709.88
  5. Step 5: Solve for x
    x = 721,289,709.88/31,004.72
  6. Step 6: Final answer
    x = 23,263.87

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.